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Which of the following correctly describes the relationship between true dip and apparent dip?
The apparent dip $\delta'$ is the angle of dip observed when the dip circle is not oriented in the magnetic meridian (tilted at angle $\phi$ from the meridian).
The relationship is: $\tan\delta' = \frac{\tan\delta}{\cos\phi}$, where $\delta$ is the true dip.
Since $\cos\phi \leq 1$: $\tan\delta' \geq \tan\delta$, so $\delta' \geq \delta$.
Therefore true dip is always less than or equal to apparent dip. They are equal only when $\phi = 0°$ (dip circle in the meridian).
A motor neuron transmits impulses:
Motor (efferent) neurons carry signals from CNS to effectors (muscles/glands). Sensory (afferent) neurons carry signals from receptors to CNS. Interneurons connect within CNS.
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